Nah dude like 25 are from major developers, 15 or so or smaller releases (e.g. Mighty No 9) or XBLA titles. 1.5TB, cause it's the 500GN internal drive and the 1TB external.The majority of your games must be indies. If you had even 40 standard disc games, you'd be well over 1TB.
I understand the load times, but they need to up the storage on the hard drives. Some games are 50-70 GBs.